Using onboard video for monitor to save GPU ram?
The answer is yes. I was able to reduce my total gpu cost! almost 440mb going from 2 monitors on the gpu to a single on the motherboard. I also found I could split parts of my scene, into separate blends files by apending them into a new scene rendering as an openexr multi layer to save all my compositor data, and compositing the two scenes together in the final version. This cut my gpu memory cost in half.